Improvement in street-lamps



1. F. MARSH. Street-Lamps.

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Patented Ju-ne 24 AM, PHOTO-l I THDGRAPHIC CO N. KMSBURJE PRGCESS.)

UNITED STATES PATENT OFFICE.,

JOSAH F. MARSH, OF DUBUQUE, IOWA.

IMPROVEMENT IN STREET-LAMPS.

Speeification forming part of Letters Patent No. l40,149, dated June 24, 1373 application filed March 6, 1873.

To all whom it may concew Be it known that I, J osmn F. MARSH, residin g at the city and county of Dubuque, State of Iowa, have invented certain Im provements in Street-Lamps, of which the following is a specification:

My invention relates to lamps, more particularly street-lamps, in which an illuminating fluid is fed to the flamefrom a reservoir on the lamp itself 5 and it consists in the mode of eonstructing and arranging such reservoir or fount, as is hereinat'ter described.

In the drawings, Figure 1 is a central vertical section with the upper portion of the cap left solid, and showing the general Construction of the lamp. Fig. 2 shows more t'ully the construction of the fount and the valve connected therewith. Fig. 8 shows the connection of the fount with the burner and the appearancc of the lamp, with the roof omitted. Fig. 4 shows the door at the bottom of the lamp and the mode of fastenin g. Fig. 5 shows the manner in which the glasses are adjusted and secured. i

A is the ring or cap, whereby the lamp-post y frame is secured. Attached to it are two,

three, or more curved supports, B B B, near to the top of which is Secured the concentric hoop or ring C O, thus making a frame for the support of the fount and lamp. The gasolinefount D surrounds the lamp, and is supported upon the top of the uprights B B. It may be made of any desired Outline, but so as to make the appearance of the lamp symmetrieal. Near the bottom of the fount is the divisionplate a, having beneath it just room enough to hold gasoline for one night s consumption. The upper compartment is designed to hold a week s supply, so as to do away with the nec-' essity of daily filling. The two eompartments are connected by the valve b, Fig. 2, so that by simply turnin g the nut c the valve is raised and the liquid fiows into the tube d through an opening therein, and thence into the lower compartment; when this is filled the valve can be closed.

Any other apparatus than that just described may be used for filling the lower compartments from the upper, and then shutting off the supply. his a Valve or opening, whereby air is adnitted to the receptacles as the gasoline is drawn away. i

The lamp I prefer to make hexagonal in shape, and its framework is composed of uprights F attached to the bottom E and the top G. The top Gr is provided with a horizontal flange, H, extending outward over the hoop 'or ring G, and thereby holding the lamp are made of two` in place. The uprights F pieces of tin, soldered together at the center, and the edges extending so as to make an opening sufticiently wide to admit the edge of the glass. (See Fig. 5.) As the lamp is made separate from theroof and the fount, the top being open and larger than the bottom, the glasses composing the six sides of the lamp may be inserted with perfect ease in the guides in the uprights F; and if one becomes broken another can with equal ease be supplied. In order to easily reach the burner a door, I, is made in the bottom of the lamp, hinged at one side, the other being fastened by simply turnin g catch or button i. (See Figs. 4 and l.) The upright F, Fig. 1, immediately over the catch to the door, has at the bottom the slot K to admit the tube L, which connects the burning apparatus with the fount and supplies the gasoline. When the lamp and fount, with tube L, have been adjusted, 11% opening can be closed by a little door or s 1 e.

One result of the peculiar Construction of the lamp-frame and fount is, that as the uprights B B are between the fount and the ring or hoop G and the flange H, there is an opening of the width of upright B between the fount and lamp. This allows a current of cold air to continually pass through, as indicated in Fig. 1, and thereby keeps the gasoline at a low temperature, and so prevents evaporation in summer.

The cap or roof of the lamp is made in two parts, joined at M, Fig. 1, and when thus put together the whole fits nicely upon the lamp, the edge o sitting over the top of the lamp Gr. The object of this' is to make economy of space in shipping the manufactured article, as well as to give access to the inside of the lamp, and facilitate washing, &0.

When it is desired to use this lamp for gas instead of gasoline, the fount can be taken out the cap of the lamp made to pass over the `lamppost frame, if wished, and it is ready for such use.

p The circular form of the fount is cheaper, more durable, and less likely to be injured then other forms; and though 'the lamp can have the numberof sides increased or diminished, yet six I regard as better, correspond ing with the circular form of the fount, and more convenient for use in other respects.

The great saving etfected by this lemp :is seen in the fact that by its use it needs to be visited but once a day, when lighted, as it goes 0nt of itself in the morning by the burning out of the gasoline` and in the ease With which it can be taken to pieces and packed, and also in its great durabilit I am aware that prior to my invention founts composed of two compartments had been used on street-lamps; but these compartments had been arranged one at the top and the other at the bottom of the lamp, the communication between the two being etl'ected by means of a tube provided with a stop-cock or valve. This arra-ngement of the two compartments, however, not only interfered with the symmetrical Construction of the apparatus, but a more serious objection lay in the fact that the lower compartment, by reason of its position below the burner, obstructed the radiation of the light.

By constrncting my compound fount or reservoir in the manner shown in the drawing-that is, by making the two compartments within the common ring 1 and separating them by a simple diaphragn-l am enabled to give my lamp a more symmetrical Outline, and at the same time I obviate the difiiculty, above named, arsing from an obstruction of the rays of light, as I am thus enabled to place the fonnt entirely above the source of illumination,

What I claim is A fount or reservoir for street-lamps, When the same is composed of two or more Compartments, and placed above the burner, substan tially as described.

JOSIAH F. MARSH.

witnesses:

JOHN E. HATCH, JEREMIAH F. TwoHrG. 

